Before you begin, if you're having this problem run through this check list:
1. Make sure you're computer is indeed on
2. Make sure you're using an iMac SMBIOS (Mac Pro System Definition doesn't have this problem)
3. If your card requires Web Drivers (GTX 9xx), make sure they're installed and...
so i am doing a hackintosh for a friend and we are using the 680 http://www.memoryexpress.com/Products/MX38608 now when i install os x do i have to do anything to make it work or is it just plug n play?